| Résumé : |
The author discusses methods of assessing pigments, in this case orange pigments, in water-based architectural paints as façade paints for exterior and interior applications.
Pigments are an extremely important group of raw materials used in the production of architectural paints. Both in the form of dry pigments and pigment concentrates (colourants), they allow for obtaining coloured coatings, which not only decorate our interiors, fences and façades, but also act as safety indicators, eg in paints for marking traffic routes or warning symbols. From an operational and economic point of view, their durability is extremely important, and knowledge about their durability to weather conditions is needed to select them for various applications, ranging from exposure to solar radiation, to operation at high temperatures. Due to the susceptibility of pigments as chemical compounds to changes in their properties, which are usually manifested in architectural paints, they must be properly classified and characterised for their proper use in formulations.
In the article, I focused on the classification of pigments that exist on the market and their resistance to light (lightfastness) and weather factors (weatherability), as well as on case studies of the exposure of three different organic orange pigments using various methods of exposure to artificial (laboratory) light sources and accelerated action of weather conditions. The article is dedicated to the methods of assessing pigments, in this case orange pigments, in water-based architectural paints as façade paints for external application, fade due to weather conditions and for interior paints fade due light exposure through window glass. This paper also exemplifies the resistance to such factors under simulated laboratory conditions, in the form of data that the paint industry needs to develop weatherability and Iightfastness stable latex paint coatings for both indoor and outdoor use. These data should usually be included in guide formulations and start point formulations, which significantly accelerate R&D work in paint production companies, and above all, make a decision on whether to accept a given raw material for testing. |
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Classification of light fastness and weather fastness of orange pigments and studies in waterborne latex paints in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4673 (02/2022)
